Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5647445 | Double piston in-the-hole hydraulic hammer drill | — | 1997-07-15 |
| 4854770 | Method and apparatus for removal of surface material | Stephen Miko | 1989-08-08 |
| 4640644 | Method and apparatus for removal of surface material | Stephen Miko | 1987-02-03 |